{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "format": "email"
    }
  },
  "required": ["email"],
  "additionalProperties": true,
  "errorMessage": {
    "properties": {
      "cart_id": "Cart id is required",
      "email": "Email is required"
    }
  }
}